According to [1.2.0 release notes](https://github.com/casper-network/casper-node/blob/53dd33865c2707c29284ccc0e8485f22ddd6fbe3/node/CHANGELOG.md?plain=1#L427), those options have different names now, and they do not have to be power of 2.
According to 1.2.0 release notes, those options have different names now, and they do not have to be power of 2.